BP_Document_Theme_Compat::directory_template_hierarchy( string $templates )

	public function directory_template_hierarchy( $templates ) {

		/**
		 * Filters the template hierarchy for the document directory page.
		 *
		 * @param array $index -directory Array holding template names to be merged into template list.
		 *
		 * @since BuddyBoss 1.4.0
		 */
		$new_templates = apply_filters(
			'bp_template_hierarchy_document_directory',
			array(
				'document/index-directory.php',
			)
		);

		// Merge new templates with existing stack
		// @see bp_get_theme_compat_templates().
		$templates = array_merge( (array) $new_templates, $templates );

		return $templates;
	}